Theoretical and Experimental Study of Servo Amplifiers for Discrete Driven Magnetostrictive Actuators

王彦文; 朱玉川; 陈龙

doi:10.13433/j.cnki.1003-8728.20230378

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Theoretical and Experimental Study of Servo Amplifiers for Discrete Driven Magnetostrictive Actuators

更新时间：2026-04-23

- Theoretical and Experimental Study of Servo Amplifiers for Discrete Driven Magnetostrictive Actuators
- Mechanical Science and Technology for Aerospace Engineering Vol. 44, Issue 11, Pages: 2028-2033(2025)
- 作者机构：
  
  南京航空航天大学机电学院,南京,210016
- 作者简介：
- 基金信息：
- DOI：10.13433/j.cnki.1003-8728.20230378
  CLC：
- Published：2025
- 稿件说明：
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王彦文, 朱玉川, 陈龙. Theoretical and Experimental Study of Servo Amplifiers for Discrete Driven Magnetostrictive Actuators[J]. Mechanical Science and Technology for Aerospace Engineering, 2025, 44(11): 2028-2033.
DOI：

王彦文, 朱玉川, 陈龙. Theoretical and Experimental Study of Servo Amplifiers for Discrete Driven Magnetostrictive Actuators[J]. Mechanical Science and Technology for Aerospace Engineering, 2025, 44(11): 2028-2033. DOI： 10.13433/j.cnki.1003-8728.20230378.

摘要

磁致伸缩执行器凭借其高动态响应目前已应用在许多领域，控制电压-电流转换是影响磁致伸缩执行器动态特性的重要环节。基于运放和功率转换电路研制了八通道伺服放大器，针对现有伺服放大器大电流和高频不能同时输出，采用MOSFET并联方式提高了驱动能力。对伺服放大器的数学模型和实验进行了研究，结果表明：伺服放大器的非线性度为0.06%，8 A输出电流下阶跃响应上升时间约为0.18 ms，在8 A、1000 Hz下输出基本无相位滞后。与美国AE Techron LVC7224功率放大器相比，八通道伺服放大器驱动方式可显著提高线圈电流的动态响应，且体积大大减小。

Abstract

Magnetostrictive actuators have been applied in many fields because of their high dynamic response. The control of voltage-current conversion is an important link that affects the dynamic characteristics of magnetostrictive actuators. Based on the operational amplifier and power conversion circuit

the eight-channel servo amplifier is developed. In view of the high current and high frequency of the existing servo amplifier cannot output at the same time

MOSFET parallel mode is used to improve the driving ability. The mathematical model and experiment of servo amplifier are studied in this paper. The results show that the nonlinear degree of servo amplifier is 0.06%

the step response rise time of 8A output current is about 0.18 ms

and the output basically has no phase lag under 8 A and 1000 Hz. Compared with the American AE Techron LVC7224 power amplifier

the eight-channel servo amplifier can significantly improve the dynamic response of the coil current

and the volume is greatly reduced.

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